[Feature Request] OVN-DNAT router-lb

[abasitt]

Kube-OVN Version

v1.13.2

Kubernetes Version

v1.30.3

Operation-system/Kernel Version

Rocky Linux 8.6
4.18.0-372.26.1.el8_6.x86_64

Description

I want to use router-lb to expose multiple endpoints behind EIP. As per the doc here, it's possible.

I wonder it's a doc bug or can this really be done ? The CR and example only allow me to attach EIP to either VIP, Single IP or PODIP but not to a service IP or group of endpoints that can be behind selector?

Steps To Reproduce

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Current Behavior

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Expected Behavior

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[dosubot]

Hey @abasitt! 👋 I'm here to help you out with any bugs, questions, or contributions you have. Let's crack this nut together!

The current implementation of the router-lb feature in Kube-OVN allows for the attachment of an EIP to different types of IPs, such as a Logical Switch Port (LSP) or for NAT purposes (FIP, DNAT, SNAT) ^[1]. However, there is no specific information available in the provided context about attaching an EIP directly to a service IP or a group of endpoints behind a selector.

The documentation you referred to might suggest that it's possible, but the examples and CRDs you mentioned seem to focus on attaching EIPs to VIPs, Single IPs, or PODIPs. This could indicate a limitation or a gap in the documentation or examples provided.

If the documentation explicitly states that attaching an EIP to a service IP or multiple endpoints is possible, it might be worth verifying if there are any additional configurations or annotations required that are not immediately apparent in the examples or CRDs.

To continue talking to Dosu, mention @dosu.

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[zbb88888]

It is not a bug, we use the ovn router lb to provide a DNAT.

You want a router LB, maybe later we can try to make it.

And there is a load balancer feature too, you can try.

[zbb88888]

you can find the switch lb rule CRD, but not have router LB rule CRD.

[abasitt]

Yeah I try the load-balancer feature but I don't like that. it creates a single LB pod which has a high fail-over timing. I wanted to try if I can use router LB directly in OVN that can be dnated to kubernetes service directly or can be mapped to group of endpoints. That would be amazing.
Would it be okay if I change this issue to feature request?

[zbb88888]

Yeah I try the load-balancer feature but I don't like that. it creates a single LB pod which has a high fail-over timing. I wanted to try if I can use router LB directly in OVN that can be dnated to kubernetes service directly or can be mapped to group of endpoints. That would be amazing. Would it be okay if I change this issue to feature request?

ok

[abasitt]

Similar to this one.
#4421